CERN Accelerating science

Accelerator Physics

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2021-06-15
16:51
Manufacturing Process Anomaly Detection in RF Cavities / Agius, Ryan
In order to accelerate charged particles and output them at a constant and controllable energy, modern particle accelerators make use of hollow, torus-like metal structures known as Radio Frequency (RF) cavities [...]
CERN-THESIS-2021-070 - 95 p.


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2021-06-12
06:33
Beam Diagnostics in the Advanced Plasma Wakefield Experiment AWAKE / Bachmann, Anna-Maria (Munich, Max Planck Inst. ; Munich, Tech. U. ; CERN) ; Muggli, Patric (Munich, Max Planck Inst.)
In AWAKE a self-modulated proton bunch drives wakefields in a plasma. [...]
2020. - 6 p.
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2021-06-01
06:15
Application of machine learning techniques at the CERN Large Hadron Collider / Van der Veken, Frederik (CERN ; Malta U.) ; Azzopardi, Gabriella (CERN ; Malta U.) ; Blanc, Fred (Ecole Polytechnique, Lausanne) ; Coyle, Loic (CERN ; Ecole Polytechnique, Lausanne) ; Fol, Elena (CERN ; Goethe U., Frankfurt (main)) ; Giovannozzi, Massimo (CERN) ; Pieloni, Tatiana (Ecole Polytechnique, Lausanne ; CERN) ; Redaelli, Stefano (CERN) ; Rivkin, Leonid (Ecole Polytechnique, Lausanne ; PSI, Villigen) ; Salvachua, Belen (CERN) et al.
Machine learning techniques have been used extensively in several domains of Science and Engineering for decades. These powerful tools have been applied also to the domain of high-energy physics, in the analysis of the data from particle collisions, for years already. [...]
SISSA, 2020 - 9 p. - Published in : PoS EPS-HEP2019 (2020) 006 Fulltext from publisher: PDF;
In : European Physical Society Conference on High Energy Physics (EPS-HEP) 2019, Ghent, Belgium, 10 - 17 Jul 2019, pp.006

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2021-05-29
09:01
Momentum bandwidth of the KEK Accelerator Test Facility 2 / Yang, R (CERN) ; Pastushenko, A (CERN ; IJCLab, Orsay) ; Cilento, V (CERN ; IJCLab, Orsay) ; Kubo, K (KEK, Tsukuba ; Sokendai, Tsukuba) ; Naito, T (KEK, Tsukuba ; Sokendai, Tsukuba) ; Okugi, T (KEK, Tsukuba ; Sokendai, Tsukuba) ; Terunuma, N (KEK, Tsukuba ; Sokendai, Tsukuba) ; Tomás, R (CERN)
Momentum bandwidth is an important characteristic for final focus systems (FFS) of future high-energy colliders. A large momentum bandwidth is a notable feature of the novel local-chromaticity-correction FFS, being demonstrated at the KEK Accelerator Test Facility 2 (ATF2), owing to the locality of chromaticity correction. [...]
2021 - 11 p. - Published in : Phys. Rev. Accel. Beams 24 (2021) 051001 Fulltext from Publisher: PDF;

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2021-05-29
09:01
Transverse Noise, Decoherence, and Landau Damping in High-Energy Hadron Colliders / Furuseth, Sondre Vik
High-energy hadron colliders are designed to generate particle collisions within specialized detectors [...]
CERN-THESIS-2021-063. - 2021. - 175 p.


10.5075/epfl-thesis-9330

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2021-05-29
09:01
Mechanical Comparison of Short Models of Nb$_3$ Sn Low-$\beta$ Quadrupole for the Hi-Lumi LHC / LARP Collaboration
-MQXF is the Nb3Sn Low-β quadrupole magnet that the HL-LHC project is planning to install in the LHC interaction regions in 2026 to increase the LHC integrated luminosity. The magnet will be fabricated in two different lengths: 4.2 m for MQXFA, built in the US by the Accelerator Upgrade Project (AUP), and 7.15 m for MQXFB, fabricated by CERN. [...]
FERMILAB-PUB-21-127-TD.- 2021 - 6 p. - Published in : IEEE Trans. Appl. Supercond. 31 (2021) 4000306 Fulltext: PDF; External link: Fermilab Accepted Manuscript
In : Applied Superconductivity Conference, Online, 24 Oct - 7 Nov 2020

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2021-05-27
06:27
Beam physics research with the IOTA electron lens / Stancari, G (Fermilab) ; Agustsson, R (RadiaBeam Tech.) ; Banerjee, N (Illinois U., Chicago) ; Boffo, C (Fermilab) ; Burov, A (Fermilab) ; Carlson, K (Fermilab) ; Cathey, B (Fermilab) ; Chen, Y C (RadiaBeam Tech.) ; Chung, M (UNIST, Ulsan) ; Crawford, D (Fermilab) et al.
The electron lens in the Fermilab Integrable Optics Test Accelerator (IOTA) will enable new research in nonlinear integrable optics, space-charge compensation, electron cooling, and the stability of intense beams. This research addresses scientific questions on high-brightness beams and operational challenges of high-power accelerators for nuclear and particle physics. [...]
2021 - 33 p. - Published in : JINST 16 (2021) P05002 Fulltext: PDF;

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2021-05-27
06:27
Imaginary tune split and repulsion single-bunch instability mechanism in the presence of a resistive transverse damper and its mitigation / Métral, E (CERN)
A resistive transverse damper is often needed in particle accelerators operating with many bunches and it is usually very efficient as it can considerably reduce the necessary amount of nonlinearities needed to reach beam stability through Landau damping. In the CERN LHC for instance, the required current in the Landau octupoles is predicted to be reduced by an order of magnitude for zero chromaticity (for the beam and machine parameters used during the last year of Run 2, in 2018, this corresponded to ∼2000  A without damper and ∼200  A with damper, knowing that the maximum current available in the Landau octupoles is ∼550  A). [...]
2021 - 8 p. - Published in : Phys. Rev. Accel. Beams 24 (2021) 041003 Fulltext from Publisher: PDF;

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2021-05-27
06:26
Design of a compact, cryogen-free superconducting solenoid for the electron lens of the Fermilab Integrable Optics Test Accelerator (IOTA) / Dhuley, R C (Fermilab) ; Boffo, C (Fermilab) ; Kashikhin, V (Fermilab) ; Kolehmainen, A (CERN) ; Perini, D (CERN) ; Stancari, G (Fermilab)
The proposed electron lens for Fermilab's Integrable Optics Test Accelerator (IOTA) will broaden its capabilities by enabling new research in nonlinear integrable optics, space-charge compensation, proton beam cooling, and more. The electron lens is based on a 5–10 keV, 1–2 A electron beam, shaped using a 0.7 m long, 0.8 T solenoidal magnetic field. [...]
2021 - 17 p. - Published in : JINST 16 (2021) T03009 Fulltext: PDF;

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2021-05-18
08:50
Evaluation of an SFP Based Test Loop for a Future Upgrade of the Optical Transmission for CERN’s Beam Interlock System / Secondo, Raffaello (CERN) ; Galilée, Marc-Antoine (CERN) ; Garnier, Jean-Christophe (CERN) ; Martin, Christophe (CERN) ; Romera, Iván (CERN) ; Siemko, Andrzej (CERN) ; Uythoven, Jan (CERN)
The Beam Interlock System (BIS) is the backbone of CERN’s machine protection system. [...]
2019. - 5 p.
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